Are football fans just cuddlier or what?

The Wikipedia article on Yankee Stadium puts that ballpark's capacity at 49,642 for baseball games, but 54,251 for football. It's anybody's guess.

My guess is, for football games they put bleachers on the field.

I looked this fact up while reading about while reading a CNN article about Syrian refugees this morning. Apparently the state department figures the U.S. can accommodate as many as 3,000 this year, 5,000 next—or enough to fill the outfield bleachers.

Also from Wikipedia, "there are an estimated half million illegal entries into the United States each year"—or about enough to sell out ten games.